Icon for a portable computing device screen



FIG. 1 is a front view of an icon for a portable computing device screen, the broken line drawing of a portable computing device screen is for illustrative purposes only and forms no part of the claimed design; and,

FIG. 2 is an enlarged front view thereof, the icon is shown separately for clarity of illustration. 

The ornamental design for an icon for a portable computing device screen, substantially as shown and described. 